APPENDIX. No. V. 485 
The whole number of species in the collection is about 620; but as spe- 
cimens of about thirty of these are so imperfect as not to be referable to 
their proper genera, and some of them not even to natural orders, its amount 
may be stated at 590 species. 
Of these about 250 are absolutely new: nearly an equal number exist also 
in different parts of the west coast of equinoctial Africa, and not in other 
countries; of which, however, the greater part are yet unpublished: and 
about 70 are common to other intratropical regions. 
Of unpublished genera there are 32 in the collection ; twelve of which are 
absolutely new, and three, though observed in other parts of this coast of 
equinoctial Africa, had not been found before in a state sufficiently perfect, 
to ascertain their structure ; ten belong to different parts of the same line of 
coast ; and seven are common to other countries. 
No natural order, absolutely new, exists in the herbarium; nor has any 
family been found peculiar to equinoetial Africa. 
The extent of Professor Smith’s herbarium proves not only the zeal and 
activity of my lamented friend, but also his great acquirements in that branch 
of science, which was his more particular province, and to his excessive exer- 
tions in the investigation of which he fell a victim, in the ill-fated expedition to 
Congo. 
Had he returned to Europe, he would assuredly have given a far more 
complete and generally interesting account of his discoveries than what is 
here attempted: and the numerous facts which he could no doubt have com- 
municated respecting the habit, the structure, and the uses of the more impor- 
tant and remarkable plants, would probably have determmed him to have 
followed a very different plan from that adopted in the present essay. 
Tt remains only that I should notice the exemplary diligence of the Botanic 
Gardener, Mr. David Lockhart, the only survivor, I believe, of the party by 
whom the river above the falls was examined, in that disastrous journey which 
proved fatal to the expedition. 
From Mr. Lockhart I have received valuable information concerning many 
of the specimens contained in the herbarium, and also respecting the esculent 
plants observed on the banks of the Congo. 
